Red Dot is an old powder, made by Hercules for many years. Not quite as old as Bullseye; that one started with Laflin & Rand, long before Hercules bought them out.
Anyway, Hercules has now been bought out, so it is an ALLIANT powder, although you might still find it in Hercules packaging.
It is a fast Shotgun powder which has some uses in largebore pistols...... and for CAST bullets in military rifles.
C.E. Harris, the Canadian firearms writer/exprimenter/authority, invented his Universal Load for Military Rifles about 50 years go. It gives LOW pressures, slightly-over-Gallery velocities (although with a slug twice the weight of a Gallery slug) and rather decent accuracy with just about zip recoil and no measurable bore wear even after many thousands of rounds.
The Load is pretty much the same for just about ANY fullbore military rifle. For a very small case (Carcano, Arisaka), you might want to drop the powder by a grain, for a large case ('06, 8x63) you might want to increase by a grain or so. BUT, for the .303, 7x57, 8x57, 8x50, 8 Lebel, 6.5 Swede, 7.5 French OR Swiss, it is all just about the same: 13 grains (possibly 14; the rifle will tell you) with a 180-grain (or close) CAST bullet. You don't do this one with jacketed slugs: danger of pressure spikes, danger of a bullet stopping in the barrel. So you use CAST and results are VERY impressive.
Several guys on this forum are using it regularly. Buffdog has it as his regular gopher-sniping load out to about 300. Tinman204 is getting 1 MOA with it; of course, he IS using a ROSS.
Box of accurate, low-recoil ammo for 2 bucks?
What's not to like?